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toshiba_bluetooth: Add three new functions to the driver 

This patch introduces three new functions, which are going to be used
by the next patches.

The functions introduced are toshiba_bluetooth_present,
toshiba_bluetooth_status and toshiba_bluetooth_disable, which queries
the presence of the device, queries the status and disables the
device respectively.

Signed-off-by: Azael Avalos <coproscefalo@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
This commit is contained in:
Azael Avalos 2015-03-26 14:56:05 -06:00 committed by Darren Hart
parent fb42d1f491
commit bb2ea96b48
1 changed files with 51 additions and 0 deletions
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51
drivers/platform/x86/toshiba_bluetooth.c
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@ -57,6 +57,38 @@ static struct acpi_driver toshiba_bt_rfkill_driver = {
.drv.pm = &toshiba_bt_pm,
};
static int toshiba_bluetooth_present(acpi_handle handle)
{
acpi_status result;
u64 bt_present;
result = acpi_evaluate_integer(handle, "_STA", NULL, &bt_present);
if (ACPI_FAILURE(result)) {
pr_err("ACPI call to query Bluetooth presence failed");
return -ENXIO;
} else if (!bt_present) {
pr_info("Bluetooth device not present\n");
return -ENODEV;
}
return 0;
}
static int toshiba_bluetooth_status(acpi_handle handle)
{
acpi_status result;
u64 status;
result = acpi_evaluate_integer(handle, "BTST", NULL, &status);
if (ACPI_FAILURE(result)) {
pr_err("Could not get Bluetooth device status\n");
return -ENXIO;
}
pr_info("Bluetooth status %llu\n", status);
return status;
}
static int toshiba_bluetooth_enable(acpi_handle handle)
{
@ -85,6 +117,25 @@ static int toshiba_bluetooth_enable(acpi_handle handle)
return -ENODEV;
}
static int toshiba_bluetooth_disable(acpi_handle handle)
{
acpi_status result;
result = acpi_evaluate_object(handle, "BTPF", NULL, NULL);
if (ACPI_FAILURE(result)) {
pr_err("Could not power OFF Bluetooth device\n");
return -ENXIO;
}
result = acpi_evaluate_object(handle, "DUSB", NULL, NULL);
if (ACPI_FAILURE(result)) {
pr_err("Could not detach USB Bluetooth device\n");
return -ENXIO;
}
return 0;
}
static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event)
{
toshiba_bluetooth_enable(device->handle);